It looks as if it is not possible to vote from the font pages. One can only assume that, by having to go through all pages up for vote, the hope is that one would like a font so much to be willing to buy it.

You can search for the designs you want to vote for by the number of the design. They are listed in order from newest (highest number) on page 1 to oldest (lowest number) on the last page until the voting starts anew each day. When the voting starts, they are still in order within the voting. That is all the designs with one vote are in order from newest to oldest, If this is as clear as mud, I'd be willing to answer any questions.

Instructions are in the Q&A section. I have attached the link here. If you are unable to find with this information, go to the inbox and address all moderators and someone will answer you shortly.